Polishing device for furnace conveyers



De 3L i929. J. w. BANFIELD POLISHING DEVICE FOR FURNACE CONVEYERS FiledMaron 22, 1929 lNvl-:N-VDR LIM/.Banfield HTTDRNE removed, increase insize Patented Dec. 31. 1929 UNITI-:DI STATES PATENT oFFl'cl-z JAMES W.BANFIELD, OF TORONTO, OHIO, ASSIGNOR T0 FOLLANSBEE BROTHERS COH- PANY,0F PITTSBURGH,

PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA POLISHING DEVICE FOR FURNACECONVEYERS Application led March 22, l1929. Serial No. 349,028.

This invention relates to polishing devices for furnace conveyers, andmore particularly to furnace conveyers of the disk type.

In a continuous normalizing or annealing furnace used in the treatmentofmetal sheets, disks or rolls are provided within a furnace upon theperipheries ofwhich the sheets rest and are moved through the furnace byrota tion of the disks. After the conveyer has. been in operation for aperiod of time, minute pro- Iject1ons,`of more or less degree, appearvon the peripheries of the disks or rolls and, unless to the point wherethey scratch or pit the sheets or other material being conveyed, therebymarring or otherwise rendering the sheets unfit for use. Tliese conveyerdisks or rolls of a continuous furnace, due to their location within thefurnace, are rendered inaccesible for the purpose of removing theseprojections from the disks ex+ cept by dismantling the furnace andremoving the disks andtheir shafts and subsequently polishing same byuse of abrasive wheels or other abrasive treatment.

. The primary object of the present invention is to provide a whichenables the disks or rolls to be polished while in the furnace and, atthe same time, to provide a device in which same is partly operated bythe movement of therolls themselves.

A further object of the invention is to provide adevice of this typewhich is of simple and economical construction, which can be easilyoperated in the reverse direction, thereby imparting a reciprocatorymovement to the device so as to enable same to effect easy and quickpolishing of the rolls with a minimum of time and labor.

In describing the invention in detail, reference is herein had to theaccompanying draw- Fig. 1 is ahorizontal sectional view of the inventionappliedto the conve er of a furnace or the like, the latter being shownin fragment, and

Fig. 2 is a section on line 2--2; Fig. 1.

Referring to said drawings, the furnace is generally indicated at F andhas the usual transverse shafts 1 therein upon which the conveyer diskslor rolls device of this character y shown in the drawings, the disks 2of adjacent shafts are stag ered and receive thereon polishing plate 3wiich' latter is preferably made of metal and has transverse elongatedopenings 4- formed therethrough. Transverse shafts 5 are mounted inbearings 6 which latter are secured to the plate or member 3. The shaftsextend over pr register with the openings in the ydirection of thelength thereof and at approximately the center of the openings.Polishing units l7 are pivoted to the shafts so as to project within theopenings 4 and to freely respond' to the action of gravity. v

These polishing units ably have an insert of carborundum 8, which latterrests upon the peripheries of the disks -or rolls, althoughotherabrasive material susceptible of withstanding the heat may be employed,if desired. abrasive material depends on the degree or character of thepolish which is desired, and in some instances metal inserts can beemployed or the lunits or flappers themselves may be made entirely ofsuch metal, possessing the desired' characteristics to impart thenecessary polish to the disks or rolls.

By referring to Fig. 1 ofthe drawings, it

will be noted that the polishing units or lliappers are preferabl madeof the length to engage two ofthe disks, and the hinge connectlons ofsaid polishing units with the shafts 5 are preferably loose,

ends of polishing units may tilt and consequently compensate for thisvariance in the levels of the disks so as to thereby engage each.

In operation, rotary movement is imparted to the disks in theirnormal'direction of rotation, a`s .indicated by the arrow in Fig. 2. Thepolishing device is then inserted at the feed end of the furnace and iscarried through the latter b and on the disks to the opposite end of theurnace. In order to effect reverse movement of the device, arope, cableor other suitable retracting means 9 is secured to the plate 3 and, uponthe device being carried to the outlet end of the furnace by themovement so that if adjacent disks do -not occupy the same level orplane, the` 2 are mounted. As

or flappers prefer'- The character of 'the of the disks, the cable isthen pulled so as to cause reverse movement of the device to the inletend of the furnace, whereupon the rope 9 is again released and theoperation is continued until the rolls have been polished to the desiredextent.

F rom the foregoing, it will be seen that'the disks themeselves areutilized to move the device in one direction Vof its reciprocatorymovement, the reverse movement or stroke being manually or otherwiseperformed. Thus, the device enables the rolls to be easily and quicklypolished and with a minimum of labor and eliort on the part of theoperator.

ln addition, it will be seen that, due to the openings 4, thelongitudinal side edges thereof will act to remove the projectionssomewhat after the manner of a scraper or cutting edge to thus increasethe eiiciency of the devlce.

What is claimed is 1. A polishing device for furnace disk conveyers,including a plate formed to seat on the conveyer disks and be movedthereby in one direction andhaving transverse openings extendingtherethrough, shafts extending lengthwise of the openings, meanstosecure the shafts tothe plate, a series of polishing units freelyhinged to the plate and formed to engage the upper arcs of the conveyerdisks, and a cable connected to one end of the plate for moving same ina direction opposite to that in Which the disks rotate.

2. A polishing device for furnace disk conveyers, including a plateformed to seat on the conveyer disks and be moved thereby in mames JAMESW. BANFIELD.

moving same in the one directionfandhaving transverse openings extendingtherethrough, =shafts extending lengthwise of the openings, `means tosecure the shafts to the plate, a series of polishing units freelyhinged to the plates and formed to engage the upper arcs of the conveyerdisks, and means connected to the plate for moving same in a directionoppositeto/that in which the disks rotate.

3. A polishing device forp'pfurnace disk conveyers including a memberformed to seat on the conveyer disks and be moved thereby in onedirection, polishing units, means to pivotally mount the units on themember so that same freely engage the upper arcs of the disks, and meansto move the member in v the oppositedirection.

4. A polishing device for furnace disk conveyers including a memberformed to seat on the conveyer disks and be moved thereby in onedirection., polishing units, means to movably mount the units on themember to cause same to engage against the upper arcs of the disks, andmeans :tor moving the member in the opposite direction.

5. A polishing device for furnace disk conveyers, including polishingmeans formed to seat upon the disks and to be moved thereby 1n onedirection, and means connected to

